Tag Archives: density

Floating Eggs in Salt Water

It is commonly observed that eggs will sink to bottom of the water, when they are placed in ordinary tap water. So how this happens? And how eggs float in salt water? We will do a simple classic salt water and egg experiment to understand the science behind it.

Required Materials




  • Ordinary water
  • Table salt
  • Table spoon
  • Wide drinking glass
  • Egg

What To Do




  1. Fill the glass with ordinary tap water.
  2. Place the egg in it and watch the egg is sinking to bottom of the glass.
  3. Now pick-up the egg from the glass and add 4 to 5 table spoon full of salt and stir to completely dissolve the salt in water.
  4. Again place the egg back into the glass and watch the floating egg.

Floating Egg











When the egg is placed in common tap water it sinks to bottom because density of water is less than the density of egg. When table salt is added to tap water its density is increased. When density of water becomes higher than the density of egg than the egg floats.





Try to float egg in middle of the water. To do this Follow these steps

  1. Fill the glass half-full with water and add 4 tablespoons of table salt and stir well.
  2. Fill a cup with ordinary tap water
  3. Now gently add the water from cup to half-filled glass so two layers of different density water don’t mix together.
  4. Now place the egg in the glass gently. If two layers water are not mixed together the egg will float in middle of the glass.

Floating Egg 1